Reasearch On Technology Load Experiment Evaluation Skills Of Foshan Dongping Bridge

The prestressed concrete continuous beam-arch combined bridge bears the loadmainly by the system consisted of arch ribs, link beam, hangers, cross beam and deck.It features properly bearing and elegant and novel form. With the arches carrying thepress, the prestressing strands in the link beam resisting the pushing force at the archends, the hangers and the deck carring the deck load, great pushing force at the archends in the traditional arch bridge does not exist any longer, and the bearing conditionof large moment and shear in the continuous beam are improved, so the full use of thecharacters of the prestressing strands and concrete in the arch and beam is made, andthe economic effect is considerable.According to the characters of this type of bridge, this thesis has done researchesin such aspects:1. load experiment and calculation with the space program ANSYS and the planeprogram BRCAD has been done about the dongping bridge, and the experimentalresults of every stage had a perfect accordance with the theoretic results, and satisfiedthe requirement of the design and the related regulations. It indicated that the dong-ping bridge had attained the constructional goal.2. Based on the analysis of the load experiment on the dongping bridge, thethesis proposed a method to calculate load lateral distribution coefficient of themulti-combined arch bride with the combined FEM, it was found that the measure-ment data agreed with the theoretic data mostly, the arch bears axial force, momentcombined with shear, the lateral distribution of axial force, moment and deflection isnot equivalent to each other, ever for the longitudinal deflection lateral distributioncoefficient, the difference is considerable, so when the load experiment is being doneon the multi- combined bridge, the experimental efficiency coefficient must bedecided with the moment or axial force lateral distribution coefficient, and thelongitudinal variation of internal force lateral distribution must be taken into account.3. Analysis of the autooscillation character and model in the prestressed concretecontinuous beam-arch combined bridge has been done and so had the dynamic loadexperiment, and natural frequencies of the front order have been given.4. Local experiment and analysis of the arch-beam combing part and thesteel-concrete deck with the PBL shearing keys have been done, reference has beenoffered for the design of novel structure.